MRI: Acquisition of a Volumetric PIV System to Study Flow Physics of Vortex Dominated Flows

摘要：KhanParticle Image Velocimetry（PIV）通过提供流场一部分的快照而不是逐点测量，极大地改进了流场诊断。利用激光片的有限厚度，从2分量PIV测量增强到3分量PIV测量，提供了对复杂流场的额外理解。然而，这种增强仍然没有导致流场的真正三维理解，因为这需要流的几个横截面切片来构建合成图片。体积PIV系统的最新可用性提供了对流动的体积区域进行瞬时流场测量的能力，从而产生真正的三维流动特性。其目的是获得一个体积PIV系统，以进行涡主导流的流场测量，从而更好地了解流动物理。 使用体积PIV测量将提供有关涡量嵌入区域的形态及其扩散到流场的有用信息。塔斯基吉大学是首屈一指的HBCU之一，并被华盛顿月刊评为第一学士学位学院。航空航天科学工程系是HBCU唯一获得ABET认证的课程，因此对增加这一重要工程领域代表性不足的少数民族人数产生了重大影响。该部门在2004年获得了NSF MRI赠款下的2D PIV系统。该设施被用来进行本科生和研究生的研究，导致两个MS论文以及在AIAA学生会议上的几个本科生的演讲。该部门目前正在开发一个生物流体动力学序列与NSF HBCU-UP计划下的生物系合作，该设施正在整合为实验室经验的一部分。因此，体积PIV系统的采购将用于学科和跨学科研究（航空航天工程，机械工程，化学工程，生物学）。此次收购所带来的流动诊断能力的增强将大大加强航天科学工程部的实验研究基础设施。学生们目前正在进行几个项目，使用三分量PIV系统来了解流场的三维性。该设施将是部门基础设施的重要补充，并支持其发展研究生课程的计划。这种诊断设施将提高本科生谁将参与本科研究的学习经验。该设施也将被用作空气动力学和仪器课程的一部分。该设施还将用于向K-12学生展示这些技术的使用，这些学生在校园内参加各种夏季丰富课程，如技术和工程少数民族（MITE）以及MSP和ITEST下的NSF资助课程。

ABSTRACT: KhanParticle Image Velocimetry (PIV) has greatly improved flow field diagnostics by providing a snap shot of a section of the flow field rather than a point by point measurement. Enhancement from a 2-component PIV to the measurement of 3-components taking advantage of the finite thickness of the laser sheet has provided additional understanding of complex flow field. However, this enhancement still does not result in a true 3-dimensional understanding of the flow field as this requires several cross-sectional slices of the flow to build a composite picture. The more recent availability of Volumetric PIV system provides the ability to conduct instantaneous flow field measurements of volumetric region of flow thereby resulting in true 3-dimensional flow characteristics. It is intended to acquire a volumetric PIV system to conduct flow field measurements of vortex-dominated flows to better understand the flow physics. Measurements using volumetric PIV will provide useful information on the morphology of the embedded regions of vorticity and its diffusion into the flow field.Tuskegee University is one of the premier HBCUs and has been ranked as the #1 Baccalaureate College by the Washington Monthly. The Aerospace Science Engineering Department is the only ABET-accredited program at an HBCU and hence has a major impact on increasing the number of under-represented minorities in this important engineering field. The Department had acquired a 2D PIV system in 2004 under the NSF MRI grant. This facility was used to conduct both undergraduate and graduate research resulting in two MS theses as well as several undergraduate student presentations at the AIAA Student conferences. The Department is currently developing a bio-fluid dynamics sequence in collaboration with the Biology Department under the NSF HBCU-UP program where the facility is being integrated as part of the laboratory experiences. The acquisition of the volumetric PIV system will therefore be used for disciplinary as well as inter-disciplinary research (Aerospace Engineering, Mechanical Engineering & Chemical Engineering, Biology). The enhancement of the flow diagnostic capability as result of this acquisition will substantially strengthen the experimental research infrastructure of the Aerospace Science Engineering Department. There are several projects that the students are currently working on using a 3-component PIV system to understand the three dimensionality of the flow fields. The facility will be an important addition to the Departmental infrastructure and support its plans to develop a graduate program. This diagnostic facility will enhance the learning experiences of undergraduate students who will be involved in undergraduate research. The facility will also be used as part of the aerodynamics and instrumentation courses. The facility will also be used to demonstrate the use of such techniques to K-12 students who are on campus for various summer enrichment programs such as the Minorities in Technology and Engineering (MITE), and NSF funded programs under MSP and ITEST.